Set max line length to 80

Configure the linters to accept a line length of 80 characters,
in line with the Google coding style.

Issue: HIC-172
Change-Id: Ie273abab3326c59b4c88739e6b6d7760bc656759
diff --git a/.pylintrc b/.pylintrc
index f670eb3..396799f 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -20,4 +20,4 @@
 [FORMAT]
 
 # Maximum number of characters on a single line.
-max-line-length=79
+max-line-length=80
diff --git a/tox.ini b/tox.ini
index 1441f97..b0b15d2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -41,6 +41,7 @@
 [flake8]
 format = ${cyan}%(path)s${reset}:${yellow_bold}%(row)d${reset}:${green_bold}%(col)d${reset}: ${red_bold}%(code)s${reset} %(text)s
 max-complexity = 10
+max-line-length = 80
 
 # Documentation
 # Shared commands for both docs options